, the chef had extra company in the kitchen. a navy officer trained in food security. >> they had a food taster in the kitchen and had to taste all the food before it went out to the presidents. he said with my job it's always a one-shot deal. there's never a second chance. >> reporter: the food is approved, but before he can serve the president, he needs to wear a special pin provided by the secret service. >> it he puts this pin on my lapel and says to me, make sure you don't lose it it. if you lose it, don't go to the table. i just bothered asking him why, and the guy said, you don't want to know why. >> reporter: if any employee approaches the president without that pin, they are considered a threat and could be taken down by the secret service. >> it happens once in a lifetime. to have the honor of serving two presidents at the same time. >> that looks good. travel like a president airs tonight on the travel channel. reminds us all we need to go back there for dinner. >>> up next, what did we learn today? >>> i'm meteorologist bill karins. a warm day across many areas of the nation.